The
Snake
hole will go live in approximately
5 days
. Why not try and solve it ahead of time?
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12 Days of Christmas
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brainfuck
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Emirp Numbers (Long)
Emojify
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Evil Numbers (Long)
Factorial Factorisation
Farey Sequence
Fibonacci
Fizz Buzz
Foo Fizz Buzz Bar
Forsyth–Edwards Notation
Fractions
Game of Life
Gijswijt’s Sequence
Gray Code Decoder
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Happy Numbers
Happy Numbers (Long)
Hexdump
Hilbert Curve
Intersection
Inventory Sequence
ISBN
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Kaprekar Numbers
Kolakoski Constant
Kolakoski Sequence
Leap Years
Levenshtein Distance
Leyland Numbers
ln 2
Look and Say
Lucky Numbers
Lucky Tickets
Mahjong
Mandelbrot
Maze
Medal Tally
Minesweeper
Morse Decoder
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Musical Chords
N Queens
Nim
Niven Numbers
Niven Numbers (Long)
Number Spiral
Odious Numbers
Odious Numbers (Long)
Ordinal Numbers
PalindromemordnilaP
Pangram Grep
Partition Numbers
Pascal’s Triangle
Pernicious Numbers
Pernicious Numbers (Long)
Poker
Polyominoes
Prime Numbers
Prime Numbers (Long)
Proximity Grid
QR Decoder
Quine
Recamán
Repeating Decimals
Reverse Polish Notation
Reversi
Rijndael S-box
Rock-paper-scissors-Spock-lizard
Roman to Arabic
ROT13
Rule 110
Scrambled Sort
Set
Seven Segment
SI Units
Sierpiński Triangle
Smith Numbers
Spelling Numbers
Star Wars GPT
Star Wars Opening Crawl
Sudoku
Sudoku (Fill-in)
Taxicab Numbers
Ten-pin Bowling
Tic-tac-toe
Time Distance
Tongue-twisters
Topological Sort
Tower of Hanoi
Transpose Sentence
Trinomial Triangle
Ulam Sequence
United States
Vampire Numbers
Van Eck Sequence
Zeckendorf Representation
Zodiac Signs
γ
λ
π
τ
φ
√2
𝑒
Apéry’s Constant
Binary Lambda Calculus
Chess960 Decoder
Chess960 Encoder
Crossword
CSS Colors (Inverse)
CSS Grid
Dragon Curve
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Hexagonal Spiral
Highly Composite Numbers
Huffman Encoder
Langton’s Ant
Lyndon Factorization
NFA Simulator
Numbrix
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Rectangle Fill
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Thue–Morse Constant
Turtle
Tutorial
Yellowstone Permutation
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><>
ALGOL 68
ArkScript
Assembly
AWK
Bash
BASIC
Berry
brainfuck
C
C#
C++
Civet
Clojure
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Coconut
Common Lisp
Crystal
D
Dart
Elixir
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F#
Factor
Forth
Fortran
Gleam
Go
GolfScript
Groovy
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Hexagony
iogii
J
Janet
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jq
Julia
K
Kotlin
Lua
Nim
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Perl
PHP
PowerShell
Prolog
Python
R
Raku
Rockstar
Ruby
Rust
Scheme
sed
SQL
Swift
Tcl
TeX
V
VimL
Wren
Zig
Experimental Language
05AB1E
APL
Arturo
Befunge
BQN
CJam
CoffeeScript
Egel
Fennel
Harbour
Hare
Haxe
Hush
Hy
Knight
Lily
Luau
Odin
Picat
Qore
Racket
Rebol
Rexx
Scala
Squirrel
Stax
Uiua
Umka
Vala
Vyxal
ZuzuScript
Hole
All
12 Days of Christmas
24 Game
99 Bottles of Beer
Abundant Numbers
Abundant Numbers (Long)
Alphabetic Numbers
Arabic to Roman
Arithmetic Numbers
Arrows
Ascending Primes
ASCII Table
Billiards
brainfuck
Calendar
Card Number Validation
Catalan Numbers
Catalan’s Constant
Chess Move Validation
Christmas Trees
Collatz
Connect Four
Continued Fractions
CSS Colors
Cubes
Day of Week
DFA Simulator
Diamonds
Divisors
Emirp Numbers
Emirp Numbers (Long)
Emojify
Evil Numbers
Evil Numbers (Long)
Factorial Factorisation
Farey Sequence
Fibonacci
Fizz Buzz
Foo Fizz Buzz Bar
Forsyth–Edwards Notation
Fractions
Game of Life
Gijswijt’s Sequence
Gray Code Decoder
Gray Code Encoder
Happy Numbers
Happy Numbers (Long)
Hexdump
Hilbert Curve
Intersection
Inventory Sequence
ISBN
Jacobi Symbol
Kaprekar Numbers
Kolakoski Constant
Kolakoski Sequence
Leap Years
Levenshtein Distance
Leyland Numbers
ln 2
Look and Say
Lucky Numbers
Lucky Tickets
Mahjong
Mandelbrot
Maze
Medal Tally
Minesweeper
Morse Decoder
Morse Encoder
Multitap Input
Musical Chords
N Queens
Nim
Niven Numbers
Niven Numbers (Long)
Number Spiral
Odious Numbers
Odious Numbers (Long)
Ordinal Numbers
PalindromemordnilaP
Pangram Grep
Partition Numbers
Pascal’s Triangle
Pernicious Numbers
Pernicious Numbers (Long)
Poker
Polyominoes
Prime Numbers
Prime Numbers (Long)
Proximity Grid
QR Decoder
Quine
Recamán
Repeating Decimals
Reverse Polish Notation
Reversi
Rijndael S-box
Rock-paper-scissors-Spock-lizard
Roman to Arabic
ROT13
Rule 110
Scrambled Sort
Set
Seven Segment
SI Units
Sierpiński Triangle
Smith Numbers
Spelling Numbers
Star Wars GPT
Star Wars Opening Crawl
Sudoku
Sudoku (Fill-in)
Taxicab Numbers
Ten-pin Bowling
Tic-tac-toe
Time Distance
Tongue-twisters
Topological Sort
Tower of Hanoi
Transpose Sentence
Trinomial Triangle
Ulam Sequence
United States
Vampire Numbers
Van Eck Sequence
Zeckendorf Representation
Zodiac Signs
γ
λ
π
τ
φ
√2
𝑒
Experimental Hole
Apéry’s Constant
Binary Lambda Calculus
Chess960 Decoder
Chess960 Encoder
Crossword
CSS Colors (Inverse)
CSS Grid
Dragon Curve
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Hexagonal Spiral
Highly Composite Numbers
Huffman Encoder
Langton’s Ant
Lyndon Factorization
NFA Simulator
Numbrix
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Rectangle Fill
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Thue–Morse Constant
Turtle
Tutorial
Yellowstone Permutation
Hole
Golfer
Bytes
Time
Submitted
Leap Years
albanian-laundromat
54
1,278ms
32 mins ago
Tower of Hanoi
albanian-laundromat
🥈
64
1,166ms
2 days ago
Tutorial
lynn
81
1,462ms
6 days ago
Tutorial
JOrE20
90
1,590ms
7 days ago
Game of Life
edsrzf
🥇
130
1,454ms
8 days ago
Game of Life
Steffan153
🥇
130
1,503ms
8 days ago
Gijswijt’s Sequence
JDiLenarda
203
1,768ms
8 days ago
Minesweeper
christos-cantina-security
490
1,451ms
9 days ago
Card Number Validation
christos-cantina-security
227
1,390ms
9 days ago
Pernicious Numbers
albanian-laundromat
🥇
45
1,349ms
9 days ago
Pernicious Numbers
CornerMercury
🥇
45
1,263ms
10 days ago
Pernicious Numbers
JOrE20
121
1,242ms
10 days ago
Star Wars GPT
JDiLenarda
🥈
224
1,482ms
10 days ago
Time Distance
JDiLenarda
🥈
348
1,615ms
10 days ago
Pernicious Numbers (Long)
JDiLenarda
20,669
1,235ms
10 days ago
Divisors
albanian-laundromat
87
1,270ms
12 days ago
Billiards
albanian-laundromat
🥈
242
1,435ms
12 days ago
Abundant Numbers (Long)
albanian-laundromat
82
1,354ms
12 days ago
Pangram Grep
albanian-laundromat
117
1,444ms
12 days ago
𝑒
JDiLenarda
112
1,411ms
13 days ago
Hexdump
JDiLenarda
242
1,466ms
13 days ago
Chess Move Validation
Steffan153
💎
131
1,530ms
14 days ago
Chess Move Validation
albanian-laundromat
🥈
169
1,503ms
14 days ago
Chess Move Validation
JOrE20
🥉
170
1,440ms
14 days ago
Zodiac Signs
JDiLenarda
385
1,433ms
14 days ago
Foo Fizz Buzz Bar
JDiLenarda
147
1,389ms
20 days ago
CSS Colors
JDiLenarda
2,531
1,385ms
20 days ago
Tutorial
zzh1996
90
1,793ms
23 days ago
Chess Move Validation
JDiLenarda
205
1,845ms
27 days ago
Prime Numbers (Long)
Florian-Mt
125
1,644ms
26 Aug 2026
Lucky Numbers
JDiLenarda
4,829
1,192ms
25 Aug 2026
Gray Code Decoder
albanian-laundromat
🥉
87
1,491ms
25 Aug 2026
Thue–Morse Constant
HumanoidCPU
1,010
1,406ms
24 Aug 2026
ISBN
edsrzf
🥈
124
1,559ms
23 Aug 2026
Nim
albanian-laundromat
🥈
143
1,411ms
21 Aug 2026
Tutorial
albanian-laundromat
90
1,741ms
21 Aug 2026
Tutorial
quasar098
217
1,862ms
20 Aug 2026
Emojify
scpchicken
586
1,767ms
20 Aug 2026
DFA Simulator
scpchicken
895
1,869ms
20 Aug 2026
Day of Week
scpchicken
797
1,663ms
20 Aug 2026
CSS Colors
scpchicken
3,837
1,668ms
20 Aug 2026
Continued Fractions
scpchicken
979
1,747ms
20 Aug 2026
Card Number Validation
scpchicken
520
1,466ms
16 Aug 2026
Calendar
scpchicken
1,029
1,492ms
16 Aug 2026
brainfuck
scpchicken
1,012
1,585ms
16 Aug 2026
Billiards
scpchicken
926
1,650ms
16 Aug 2026
Arrows
scpchicken
938
2,001ms
16 Aug 2026
Arabic to Roman
scpchicken
891
1,836ms
16 Aug 2026
Foo Fizz Buzz Bar
scpchicken
5,730
1,400ms
16 Aug 2026
Evil Numbers (Long)
scpchicken
1,961
1,327ms
16 Aug 2026
Evil Numbers
scpchicken
81
1,316ms
16 Aug 2026
Farey Sequence
scpchicken
4,365
1,242ms
16 Aug 2026
Factorial Factorisation
scpchicken
873
1,234ms
16 Aug 2026
Emirp Numbers (Long)
scpchicken
1,167
1,288ms
16 Aug 2026
Emirp Numbers
scpchicken
147
1,369ms
16 Aug 2026
Divisors
scpchicken
1,177
1,380ms
16 Aug 2026
Diamonds
scpchicken
1,114
1,361ms
16 Aug 2026
Christmas Trees
scpchicken
556
1,338ms
16 Aug 2026
Cubes
scpchicken
4,112
1,342ms
16 Aug 2026
Gijswijt’s Sequence
scpchicken
2,011
1,425ms
16 Aug 2026
Catalan’s Constant
scpchicken
1,014
1,347ms
16 Aug 2026
ASCII Table
scpchicken
284
1,348ms
16 Aug 2026
Ascending Primes
scpchicken
523
1,296ms
16 Aug 2026
Arithmetic Numbers
scpchicken
37,653
1,313ms
16 Aug 2026
Abundant Numbers (Long)
scpchicken
975
1,338ms
16 Aug 2026
Abundant Numbers
scpchicken
174
1,384ms
16 Aug 2026
99 Bottles of Beer
scpchicken
11,896
1,329ms
16 Aug 2026
12 Days of Christmas
scpchicken
733
1,467ms
15 Aug 2026
Hexagonal Spiral
bitsandbeyond
267
1,367ms
14 Aug 2026
Continued Fractions
albanian-laundromat
🥇
149
1,452ms
14 Aug 2026
Zodiac Signs
Yax42
🥉
194
1,389ms
13 Aug 2026
Vampire Numbers
scpchicken
💎
146
1,749ms
8 Aug 2026
Yellowstone Permutation
HumanoidCPU
4,018
1,352ms
8 Aug 2026
Alphabetic Numbers
scpchicken
💎
212
1,284ms
6 Aug 2026
Ulam Sequence
dokutan
🥉
554
1,443ms
31 Jul 2026
Sudoku (Fill-in)
albanian-laundromat
💎
263
1,746ms
30 Jul 2026
Ulam Sequence
JDiLenarda
🥈
168
1,509ms
28 Jul 2026
Maze
albanian-laundromat
🥈
156
1,927ms
28 Jul 2026
Ulam Sequence
albanian-laundromat
💎
130
1,484ms
26 Jul 2026
Topological Sort
albanian-laundromat
💎
164
1,581ms
26 Jul 2026
Fibonacci
prplz
46
1,677ms
21 Jul 2026
Pernicious Numbers
prplz
🥇
45
1,604ms
21 Jul 2026
Card Number Validation
edsrzf
🥈
107
1,577ms
21 Jul 2026
Hilbert Curve
scpchicken
💎
429
1,511ms
19 Jul 2026
Zodiac Signs
albanian-laundromat
🥇
175
1,479ms
18 Jul 2026
Fibonacci
michelebastione
74
1,374ms
17 Jul 2026
Abundant Numbers
prplz
75
1,372ms
14 Jul 2026
Prime Numbers
fuzzylojik-golf
🥇
49
1,407ms
8 Jul 2026
Happy Numbers
fuzzylojik-golf
🥇
66
1,271ms
8 Jul 2026
Farey Sequence
edsrzf
72
1,469ms
7 Jul 2026
π
vhoulbreque
1,053
1,544ms
5 Jul 2026
Seven Segment
kasarino
402
1,625ms
25 Jun 2026
γ
retrohun
1,042
1,412ms
23 Jun 2026
Catalan Numbers
albanian-laundromat
55
1,725ms
20 Jun 2026
Kaprekar Numbers
edsrzf
🥇
86
1,492ms
19 Jun 2026
Kaprekar Numbers
JayXon
🥇
86
2,847ms
19 Jun 2026
Ellipse Perimeters
Shanethegamer
112
1,377ms
16 Jun 2026
Connect Four
JDiLenarda
🥉
904
2,060ms
15 Jun 2026
Fibonacci
prestosilver
101
1,615ms
12 Jun 2026
Seven Segment
blaztoma
🥉
160
1,468ms
11 Jun 2026